3702721 has 12 divisors (see below), whose sum is σ = 4136832. Its totient is φ = 3311000.

The previous prime is 3702697. The next prime is 3702757. The reversal of 3702721 is 1272073.

It is not a de Polignac number, because 3702721 - 2⁵ = 3702689 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 3702692 and 3702701.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3702791) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8376 + ... + 8806.

It is an arithmetic number, because the mean of its divisors is an integer number (344736).

Almost surely, 2^3702721 is an apocalyptic number.

It is an amenable number.

3702721 is a deficient number, since it is larger than the sum of its proper divisors (434111).

3702721 is a wasteful number, since it uses less digits than its factorization.

3702721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 524 (or 513 counting only the distinct ones).

The product of its (nonzero) digits is 588, while the sum is 22.

The square root of 3702721 is about 1924.2455664494. The cubic root of 3702721 is about 154.7059426570.

Adding to 3702721 its reverse (1272073), we get a palindrome (4974794).

The spelling of 3702721 in words is "three million, seven hundred two thousand, seven hundred twenty-one".